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Examining the Role of Nasopharyngeal-associated Lymphoreticular Tissue NALT in Mouse Responses to Vaccines
Published on: August 1, 2012
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Lymphocytes and nonlymphoid cells in human nasal polyps
A E Stoop1, H A van der Heijden, J Biewenga
1Department of Otorhinolaryngology/Head and Neck Surgery, Free University Hospital, Amsterdam, The Netherlands.
The Journal of Allergy and Clinical Immunology
|February 1, 1991
Summary
Nasal polyps show a higher concentration of CD8+ T-cells compared to CD4+ T-cells, indicating a role for T-cell disturbances in chronic inflammation and polyp development.
Area of Science:
- Immunology
- Otorhinolaryngology
- Pathology
Background:
- Nasal polyps are associated with chronic inflammation.
- The specific immune cell profiles in nasal polyps and surrounding tissues require further elucidation.
Purpose of the Study:
- To investigate the cellular composition of nasal polyps and compare it with unaffected nasal mucosa.
- To explore the potential role of immune cell disturbances in the pathogenesis of nasal polyps.
Main Methods:
- Immunohistochemical staining was performed on nasal polyp specimens (n=48) and mucosal biopsies from middle (n=23) and inferior turbinates (n=28).
- Quantification of various immune cells including T-lymphocytes (CD2+, CD4+, CD8+), B-cells (CD22+), HLA-DR+ cells, eosinophils, mast cells, plasma cells, and neutrophils.
Main Results:
- Nasal polyps exhibited significantly more CD8+ (suppressor/cytotoxic) than CD4+ (helper/inducer) T-cells.
- Immune cell counts in polyps were similar to middle turbinate mucosa but higher than inferior turbinates.
- Eosinophils were abundant in 77% of polyps, with moderate numbers of mast cells, plasma cells, and neutrophils.
Conclusions:
- The findings suggest a T-cell-dependent inflammatory process in nasal polyp pathogenesis.
- Disturbances in T-cell populations may contribute to the chronic inflammation observed in nasal polyps.
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